schoolbag=['语文书','数学书','练习册','笔盒']
schoolbag1=schoolbag
print(schoolbag,schoolbag1)
schoolbag[0]='英语书'
print(schoolbag,schoolbag1)



schoolbag=['语文书','数学书','英语书','漫画书']
length=len(schoolbag)
i=0
while i < length:
    print(schoolbag[i])
    i+=1


schoolbag=['语文书','数学书','英语书','漫画书']
for item in schoolbag:
    print(item)



schoolbag=['语文书','数学书','英语书','漫画书']
print(schoolbag)
workbook=['语文练习册','数学练习册']
penbox=['铅笔','油笔','橡皮']
schoolbag.extend(workbook)

schoolbag=['语文书','数学书','英语书','漫画书']
print(schoolbag)
schoolbag.pop(2)
print(schoolbag)
schoolbag.remove('漫画书')
print(schoolbag)